Brush::IntersectsBrush

This method can be used to test whether two brushes intersect.

Syntax

• bool IntersectsBrush(shared_ptr<Brush> brush)

Returns

Returns true of the two brushes overlap, otherwise false is returned.

Example

Use the left and right key to move the blue brush. When the two objects intersects, it will turn red.

#include "UltraEngine.h"

using namespace UltraEngine;

int main(int argc, const char* argv[])
{
    //Get the displays
    auto displays = GetDisplays();

    //Create a window
    auto window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR);

    //Create a framebuffer
    auto framebuffer = CreateFramebuffer(window);

    //Create a world
    auto world = CreateWorld();

    //Create a camera    
    auto camera = CreateCamera(world);
    camera->SetClearColor(0.125);
    camera->Turn(35, 0, 0);
    camera->Move(0, 0, -6);

    //Create light
    auto light = CreateBoxLight(world);
    light->SetRange(-20, 20);
    light->SetArea(20, 20);
    light->SetRotation(35, 35, 0);
    light->SetColor(3);

    //Create brush
    auto brush = CreateBoxBrush(world, 10, 2, 2);

    //Slice brush
    auto A = CreateBrush(world);
    auto B = CreateBrush(world);
    Plane sliceplane = Plane(1, 1, -1, 0);
    brush->Slice(sliceplane, A, B);
    A->SetColor(0, 1, 0);
    A->Move(-0.75, 0, 0);
    B->SetColor(0, 0, 1);
    B->Move(0.75, -0.5, 0.5);
    brush = NULL;

    //Main loop
    while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false)
    {
        B->Move(float(window->KeyDown(KEY_RIGHT) - window->KeyDown(KEY_LEFT)) * 0.1, 0, 0);

        if (A->IntersectsBrush(B))
        {
            B->SetColor(1, 0, 0);
        }
        else
        {
            B->SetColor(0, 0, 1);
        }

        world->Update();
        world->Render(framebuffer);
    }
    return 0;
}